Cyclic flexural behavior of hybrid SMA/steel fiber reinforced concrete analyzed by optical and acoustic techniques

2018 ◽  
Vol 201 ◽  
pp. 248-260 ◽  
Author(s):  
Muhammad M. Sherif ◽  
Evelina M. Khakimova ◽  
Jonathon Tanks ◽  
Osman E. Ozbulut
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Acoustic Techniques

scholarly journals Flexural Behavior of Steel Fiber Reinforced Concrete Beams: Probabilistic Numerical Modeling and Sensitivity Analysis

2021 ◽  
Vol 11 (20) ◽  
pp. 9591
Author(s):  
Predrag Blagojević ◽  
Nikola Blagojević ◽  
Danijel Kukaras
Keyword(s):  
Sensitivity Analysis ◽  
Reinforced Concrete ◽  
Material Properties ◽  
Probabilistic Models ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete

One of the principle issues concerning the practical application of steel fiber reinforced concrete (SFRC) is the uncertainty related to its structural behavior, primarily caused by the partially random distribution and orientation of steel fibers in SFRC structural elements. This paper aims to provide a better understanding of how the variance of material properties of the SFRC affects the flexural behavior of SFRC beams. First, a distributed plasticity fiber finite element model of beam flexural behavior is proposed and validated. Then, probability distributions of selected material properties are defined based on existing probabilistic models and experimental results from the literature. Finally, a variance-based sensitivity analysis is performed using Sobol’ indices to identify uncertainties in material properties that contribute most to the uncertainties related to three characteristic points of a beam’s flexural behavior: first crack, yield, and collapse point. Sensitivity analysis is performed by surrogating the numerical model using polynomial chaos expansion. The variance in residual tensile strength is identified as the main contributor to the variance in the flexural behavior of an SFRC beam used in the case study.

scholarly journals Influence of Tire-Recycled Steel Fibers on Strength and Flexural Behavior of Reinforced Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Yancong Zhang ◽  
Lingling Gao
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Plastic Material ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Flexural Toughness ◽  
Recycled Steel

Tire production is increasing every year due to the increase in vehicle sales. The generation and disposal of waste are inherent to life itself and have presented very serious problems to the human community in China. Recently, some research has been devoted to the use of tire-recycled steel fibers in concrete. This study is focusing on the use of tire-recycled steel fibers. Several volume ratios of tire-recycled steel fibers were used in concrete mix to fabricate and test. Reinforced concrete obtains evidence and satisfactory improvement by adding tire-recycled steel fibers, mostly in compressive strength, splitting strength, flexural tensile strength, and flexural toughness. The strength and flexural toughness of the tire-recycled steel fiber reinforced concrete are lower than those of industrial steel fibers. To obtain concrete with approximately the same strength or toughness, the content of tire-recycled steel fibers should be about 1%-2% higher than that of industrial steel fibers. In addition, the load-deflection curve tends to become fuller after the first crack, and the second peak of the load continues to increase. The steel fiber reinforced concrete is getting closer to the ideal elastic-plastic material.

Flexural Behavior of Steel Fiber Reinforced Concrete Shield Tunnel Segment

2017 ◽  
Vol 263 ◽  
pp. 12-17
Author(s):  
Fa Sheng Zhang ◽  
Yun Xing Shi ◽  
Jing Bin Shi ◽  
Kun Ni ◽  
Yan Gang Zhang ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Scale Model ◽  
Shield Tunnel ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Reduced Scale

In order to study the flexural behavior of steel fiber reinforced concrete (SFRC) shield tunnel segment, two full scale shield tunnel segments and twelve reduced scale shield tunnel segments were made and tested. Based on the experiment study, the effectiveness of reduced scale segment was analyzed. Meanwhile, based on the fail mode, load-deflection curves and crack width, the part substitution of steel reinforcement by steel fibers was studied. Test results showed that the reduced scale model can reflect the flexural behavior of full scales tunnel segment and 45kg/m3 steel fibers of 3D type can replace 17% longitudinal reinforcement and 70% stirrups.

Sign in / Sign up

Export Citation Format

Share Document